Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
176
TSMC
TSM
$2.2T
| $79.8M | 0.05% |
480,522
+451,305
| +1,545% | +$87.7M |
|
177
CALL
AT&T
T
$155B
| $79.3M | 0.05% |
2,805,900
-824,800
| -23% | -$20.7M |
|
|
NVO
178
CALL
Novo Nordisk
NVO
$218B
| $79.3M | 0.05% |
1,142,000
+30,700
| +3% | +$2.54M |
|
179
PUT
Qualcomm
QCOM
$183B
| $79.2M | 0.05% |
515,800
-419,400
| -45% | -$68.4M |
|
180
CALL
Target
TGT
$63.4B
| $78.7M | 0.05% |
754,200
-135,300
| -15% | -$16.9M |
|
181
CALL
Trade Desk
TTD
$8.58B
| $78.4M | 0.05% |
1,433,300
+1,164,400
| +433% | +$105M |
|
182
Intel
INTC
$530B
| $76.8M | 0.05% |
3,380,296
-190,644
| -5% | -$4.17M |
|
183
CALL
MongoDB
MDB
$24.7B
| $76.7M | 0.05% |
437,300
+115,600
| +36% | +$28.2M |
|
|
184
PUT
AT&T
T
$155B
| $76.2M | 0.05% |
2,693,300
+1,274,400
| +90% | +$32M |
|
|
X
185
PUT
DELISTED
US Steel
X
| $76M | 0.05% |
1,798,900
+58,600
| +3% | +$2.22M |
|
186
CALL
Lockheed Martin
LMT
$117B
| $75.7M | 0.05% |
169,400
-3,400
| -2% | -$1.57M |
|
187
CALL
Shopify
SHOP
$160B
| $75.3M | 0.05% |
789,100
-386,000
| -33% | -$42.1M |
|
188
CALL
Datadog
DDOG
$90.7B
| $74.4M | 0.05% |
750,000
+249,900
| +50% | +$31.5M |
|
189
PUT
JD.com
JD
$41.1B
| $73.9M | 0.05% |
1,797,200
-529,100
| -23% | -$21.2M |
|
190
PUT
Johnson & Johnson
JNJ
$599B
| $73.3M | 0.05% |
527,300
+17,200
| +3% | +$2.69M |
|
191
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $73.2M | 0.05% |
3,712,800
-939,600
| -20% | -$76.5M |
|
192
CALL
Amgen
AMGN
$198B
| $72M | 0.05% |
231,000
-36,400
| -14% | -$10.7M |
|
193
PUT
Capital One
COF
$127B
| $71.5M | 0.05% |
398,800
+147,700
| +59% | +$27.9M |
|
194
CALL
Energy Transfer Partners
ET
$69.7B
| $70.7M | 0.05% |
3,803,300
+450,700
| +13% | +$8.78M |
|
|
195
PUT
Shopify
SHOP
$160B
| $70.3M | 0.05% |
736,400
-542,000
| -42% | -$59.1M |
|
196
PUT
Freeport-McMoran
FCX
$89.9B
| $70.3M | 0.05% |
1,856,900
-205,200
| -10% | -$7.85M |
|
197
PUT
Marvell Technology
MRVL
$187B
| $69.5M | 0.04% |
1,128,700
-226,300
| -17% | -$22M |
|
198
PUT
Procter & Gamble
PG
$345B
| $69.3M | 0.04% |
406,700
+30,200
| +8% | +$5.06M |
|
|
199
PUT
Target
TGT
$63.4B
| $67.2M | 0.04% |
644,400
+41,000
| +7% | +$5.12M |
|
200
PUT
Bristol-Myers Squibb
BMY
$124B
| $67.2M | 0.04% |
1,101,800
+219,900
| +25% | +$12.8M |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.